Have you considered

that your wife maybe using this religion to escape from you being overbearing on her? It is obvious from what you say that you have invested a lot of effort into trying to convince her to do and be someone else. You maybe too blind to see your own faults in this situation. People have to come to their own crisis in life in order to see they have to change directions. This is not something that you can do, so let her be. God may have your wife where she is at for a reason. You have to trust God to make the change and I bet London to a brick He will begin by changing you first. If your opponent is God then my advice is give up.. quick. JB